# ANSI/IEEE liquid flow switch symbol

Canonical URL: https://eloragrid.ai/symbols/ansi-liquid-flow-switch
Publisher: Elora Grid
Updated: 2026-10-14
Lookup label: FS LIQ
Drawing use: Schematic
Reference families: IEEE / ANSI, Manufacturer

## Symbol convention

Convention: IEEE / ANSI
Form: Autodesk IEEE-oriented Miscellaneous Switches functional form
Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted.
Related representation: [Liquid flow switch](https://eloragrid.ai/symbols/liquid-flow-switch)

IEEE-oriented graphical reference for liquid flow switch, with public vendor evidence and drawing-reading notes.

## What it represents

The flow-switch form associates an electrical contact with a documented flow condition. A cooling-system permissive or loss-of-flow alarm needs the process circuit and operate condition to be identified, rather than a bare contact label.
This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic.

## How to read it

- State whether the contact indicates adequate flow or another specified condition.
- Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code.

## Information to show or reference

- Name fluid circuit
- Record operation/reset conditions
- Reference signal destination

## Important distinction

A flow switch reports a discrete condition while a flow transmitter reports a measured quantity.

## Facts

- Convention evidence: Autodesk IEEE Symbol Preview — Miscellaneous Switches
- Public vendor block name: HFS11 (Autodesk identifier; not an IEEE symbol number)
- Standards context: IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved.
- Artwork scope: Original functional illustration; exact standard glyph and compliance are not certified

## Public references

- [Autodesk IEEE Symbol Preview — Miscellaneous Switches](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-278F6C21-B1A6-4EA1-A535-E78D53BBD10D.htm) — Autodesk. Exact public IEEE-oriented category page verifying the component name and vendor block identifier.
- [IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams](https://standards.ieee.org/ieee/315/515/) — IEEE Standards Association. Graphic-symbol standards context and official status; not a source of reproduced artwork.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.